<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>h2页面</title>
	</head>
	<body>
		<h1>我是h2页面</h1>
		<button id="back6">回到页面6</button>
	</body>
	<script type="text/javascript">
		document.getElementById('back6').onclick=function(){
			history.go(-2);
		}
	</script>
</html>
